No northbound express lanes on Interstate 15 today, between SR 56 and SR 163 -- and you can blame the weather.

The lanes normally operate in the northbound direction from noon to 7 p.m. on weekdays.

Caltrans engineers will monitor the weather hourly between 2 and 7 p.m. to determine is the lanes can reopen. If conditions do not improve the Express Lanes could remain closed for the evening commute, says Caltrans.

Caltrans is encouraging commuters to leave some extra time for their drive home today.